Interview Question


Country: United States
Interview Type: Phone Interview




Comment hidden because of low score. Click to expand.
0
of 0 vote

{
SELECT first_name "First Name"
FROM employees;
}

- Anonymous February 09, 2021 | Flag Reply
Comment hidden because of low score. Click to expand.
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of 0 vote

I think you are being asked whether you should use char versus varchar for datatype. Even though char may take up more space it is apparently more efficient because of the way varchars are stored.
They are also asking you about how you might index the table. Indexes are great for speeding up reads but slow down updates, inserts and deletes. A clustered index on firstname/lastname is great where you are predominantly doing reads.

- Anonymous February 12, 2021 | Flag Reply


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